Stud question.

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elan23

elan23

Active Member
Posts
338
Location
Durham
Just bought a 2.5 petrol head for my 1975 swb petrol. The head on mine is very butchered around the thermostat housing and its not unleaded so it was a perfect solution when one appeared on e-bay. My main question relates to the manifold studs, are the threads the same 2.5 to 2.3?

Thanks in advance to anybody replying.
 
I would say no. The later 5 bearing engines where metric so I would think the 2.5 also is.
 
jamesmartin said:
all 5 bearing engines are metric so 2.3 will be
Click to expand...

Hi James, are you referring specifically to the 5mb heads all being metric or the engines in general?
My nov 1980 5 bearing is imperial and so is my spare 5mb engine which (diesels).
I was informed by Turner Engineering that the switch to metric was in 1981 and therefore some 5mb were imperial.
I can't speak specifically for the head but definitely some other aspects of the engine.
 
The easiest way to find out is to take a nut off and try a metric one on ... if it don't fit, there is a very good chance that it might be Imperial :doh:

Even the socket/spanner size gives a reasonably good clue
 
Oldseadog said:
The easiest way to find out is to take a nut off and try a metric one on ... if it don't fit, there is a very good chance that it might be Imperial :doh:

Even the socket/spanner size gives a reasonably good clue
Click to expand...

I've seen people get dirty hands doing daft things like that! :)
 
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